C200 datasheet(22/82 Pages) INTEL

22 / 82 page

Errata

Specification Update

16.

USB Full-/Low-speed Port Reset or Clear TT Buffer Request

Problem:

One or more full-/low-speed USB devices on the same RMH controller may be affected

if the devices are not suspended and either (a) software issues a Port Reset OR (b)

software issues a Clear TT Buffer request to a port executing a split full-/low-speed

Asynchronous Out command.

• The Small window of exposure for full-speed device is around 1.5 microseconds

and around 12 microseconds for a low-speed device.

Implication: The affected port may stall or receive stale data for a newly arrived split transfer

occurring at the time of the Port Reset or Clear TT Buffer request.

Note:

This issue has only been observed in a synthetic test environment.

Workaround: None.

Status:

No Plan to Fix.

17.

Intel® 82579 Gigabit Ethernet Controller Transmission Issue

Problem:

Intel® 82579 Gigabit Ethernet Controller with the Intel 6 Series Chipset and Intel C200

Series Chipset and Intel ME Firmware 7.x 5 MB may stop transmitting during a data

transfer.

Implication: Intel 82579 Gigabit Ethernet Controller may stop transmitting packets, the link LED will

blink, and a power cycle may be required to resume transmission activity.

Note:

This issue has only been observed in a focused test environment where data is

constantly transferred over an extended period of time (more than approximately 3

hours).

Workaround: A combination of Intel ME Firmware code change and Intel 82579 Gigabit Ethernet

Controller LAN Driver update has been identified and may be implemented as a

workaround for this erratum.

Status:

No Plan to Fix.

18.

USB RMH Think Time Issue

Problem:

The Intel 6 Series Chipset and Intel C200 Series Chipset USB RMH Think Time may

exceed its declared value in the RMH hub descriptor register of 8 full-speed bit times.

Implication: If the OS USB driver fully subscribes a USB microframe, full-/low-speed transactions

may exceed the microframe boundary.

Note:

No functional failures have been observed.

Workaround: None.

Status:

No Plan to Fix.

C200 Datasheet(PDF) 22 Page - Intel Corporation

C200 Datasheet(HTML) 22 Page - Intel Corporation

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